I second this suggestion. It'd be nice purely to not waste so much time doing something so tedious.
I also wish there was a way you could just insert all the items (cobwebs/wool) into a loom/spinning wheel etc at once. I'm not sure if this is possible, but it'd save a lot of time dragging everything one by one if it could be possible.
Well the only easy way to put more materials at once would be to increase stack size.
It's not a server up for profit so it makes no sense to limit the size of the inventory with small stacks for non game breaking items. (e.g. potions stacks increase would be game breaking but cobweb stacks increase would definitely not be).
On the main topic discussed: auto-production.
Would it be possible to add auto-production for metal conversion even if it means to remove the mini-game and potential bonus product in auto-prod mode ? (keep the mini-game in normal mode since it's required to rank up the skill)